FTP stands for File Transfer Protocol. It’s a method for moving files between computers, over the internet, that has been in use for decades. FTP connections are not encrypted, which means that your files could potentially be seen and copied by a third party.
By default, FileZilla Pro attempts to use FTPS for FTP connections, and will display a warning if the remote server does not support encrypted connections.
The video tutorial below shows how FTP Works.
Video tutorial: How FTP Works
Related Topic: